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+ ExecConstraints()

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REL6_4
Vadim B. Mikheev 29 years ago
parent faebf2f8a2
commit d40885cc40
1 changed files with 133 additions and 43 deletions
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  1. 176
      src/backend/executor/execMain.c

176
src/backend/executor/execMain.c
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@ -26,7 +26,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/executor/execMain.c,v 1.18 1997/08/22 03:12:16 vadim Exp $
* $Header: /cvsroot/pgsql/src/backend/executor/execMain.c,v 1.19 1997/08/22 14:28:20 vadim Exp $
*
*-------------------------------------------------------------------------
*/
@ -73,8 +73,6 @@ static void ExecDelete(TupleTableSlot *slot, ItemPointer tupleid,
static void ExecReplace(TupleTableSlot *slot, ItemPointer tupleid,
EState *estate, Query *parseTree);
static HeapTuple ExecAttrDefault (Relation rel, HeapTuple tuple);
/* end of local decls */
#ifdef QUERY_LIMIT
@ -930,29 +928,15 @@ ExecAppend(TupleTableSlot *slot,
if ( resultRelationDesc->rd_att->constr )
{
if ( resultRelationDesc->rd_att->constr->num_defval > 0 )
{
HeapTuple newtuple;
newtuple = ExecAttrDefault (resultRelationDesc, tuple);
if ( newtuple != tuple )
{
Assert ( slot->ttc_shouldFree );
slot->val = tuple = newtuple;
}
}
if ( resultRelationDesc->rd_att->constr->has_not_null )
HeapTuple newtuple;
newtuple = ExecConstraints ("ExecAppend", resultRelationDesc, tuple);
if ( newtuple != tuple ) /* modified by DEFAULT */
{
int attrChk;
for (attrChk = 1; attrChk <= resultRelationDesc->rd_att->natts; attrChk++)
{
if (resultRelationDesc->rd_att->attrs[attrChk-1]->attnotnull && heap_attisnull(tuple,attrChk))
elog(WARN,"ExecAppend: Fail to add null value in not null attribute %s",
resultRelationDesc->rd_att->attrs[attrChk-1]->attname.data);
}
Assert ( slot->ttc_shouldFree );
pfree (tuple);
slot->val = tuple = newtuple;
}
}
@ -1081,15 +1065,19 @@ ExecReplace(TupleTableSlot *slot,
* ----------------
*/
if (resultRelationDesc->rd_att->constr && resultRelationDesc->rd_att->constr->has_not_null)
{
int attrChk;
for (attrChk = 1; attrChk <= resultRelationDesc->rd_att->natts; attrChk++) {
if (resultRelationDesc->rd_att->attrs[attrChk-1]->attnotnull && heap_attisnull(tuple,attrChk))
elog(WARN,"ExecReplace: Fail to update null value in not null attribute %s",
resultRelationDesc->rd_att->attrs[attrChk-1]->attname.data);
}
}
if ( resultRelationDesc->rd_att->constr )
{
HeapTuple newtuple;
newtuple = ExecConstraints ("ExecReplace", resultRelationDesc, tuple);
if ( newtuple != tuple ) /* modified by DEFAULT */
{
Assert ( slot->ttc_shouldFree );
pfree (tuple);
slot->val = tuple = newtuple;
}
}
/* ----------------
* replace the heap tuple
@ -1140,7 +1128,8 @@ ExecAttrDefault (Relation rel, HeapTuple tuple)
{
int ndef = rel->rd_att->constr->num_defval;
AttrDefault *attrdef = rel->rd_att->constr->defval;
ExprContext *econtext = makeNode(ExprContext);
ExprContext *econtext = makeNode (ExprContext);
HeapTuple newtuple;
Node *expr;
bool isnull;
bool isdone;
@ -1150,21 +1139,23 @@ ExecAttrDefault (Relation rel, HeapTuple tuple)
char *repl = NULL;
int i;
econtext->ecxt_scantuple = NULL; /* scan tuple slot */
econtext->ecxt_innertuple = NULL; /* inner tuple slot */
econtext->ecxt_outertuple = NULL; /* outer tuple slot */
econtext->ecxt_relation = NULL; /* relation */
econtext->ecxt_relid = 0; /* relid */
econtext->ecxt_param_list_info = NULL; /* param list info */
econtext->ecxt_range_table = NULL; /* range table */
for (i = 0; i < ndef; i++)
{
if ( !heap_attisnull (tuple, attrdef[i].adnum) )
continue;
expr = (Node*) stringToNode (attrdef[i].adbin);
econtext->ecxt_scantuple = NULL; /* scan tuple slot */
econtext->ecxt_innertuple = NULL; /* inner tuple slot */
econtext->ecxt_outertuple = NULL; /* outer tuple slot */
econtext->ecxt_relation = NULL; /* relation */
econtext->ecxt_relid = 0; /* relid */
econtext->ecxt_param_list_info = NULL; /* param list info */
econtext->ecxt_range_table = NULL; /* range table */
val = ExecEvalExpr (expr, econtext, &isnull, &isdone);
pfree (expr);
if ( isnull )
continue;
@ -1182,9 +1173,108 @@ ExecAttrDefault (Relation rel, HeapTuple tuple)
}
pfree (econtext);
if ( repl == NULL )
return (tuple);
return (heap_modifytuple (tuple, InvalidBuffer, rel, replValue, replNull, repl));
newtuple = heap_modifytuple (tuple, InvalidBuffer, rel, replValue, replNull, repl);
pfree (repl);
pfree (replNull);
pfree (replValue);
return (newtuple);
}
static char *
ExecRelCheck (Relation rel, HeapTuple tuple)
{
int ncheck = rel->rd_att->constr->num_check;
ConstrCheck *check = rel->rd_att->constr->check;
ExprContext *econtext = makeNode (ExprContext);
TupleTableSlot *slot = makeNode (TupleTableSlot);
RangeTblEntry *rte = makeNode (RangeTblEntry);
List *rtlist;
List *qual;
bool res;
int i;
slot->val = tuple;
slot->ttc_shouldFree = false;
slot->ttc_descIsNew = true;
slot->ttc_tupleDescriptor = rel->rd_att;
slot->ttc_buffer = InvalidBuffer;
slot->ttc_whichplan = -1;
rte->relname = nameout (&(rel->rd_rel->relname));
rte->timeRange = NULL;
rte->refname = rte->relname;
rte->relid = rel->rd_id;
rte->inh = false;
rte->archive = false;
rte->inFromCl = true;
rte->timeQual = NULL;
rtlist = lcons (rte, NIL);
econtext->ecxt_scantuple = slot; /* scan tuple slot */
econtext->ecxt_innertuple = NULL; /* inner tuple slot */
econtext->ecxt_outertuple = NULL; /* outer tuple slot */
econtext->ecxt_relation = rel; /* relation */
econtext->ecxt_relid = 0; /* relid */
econtext->ecxt_param_list_info = NULL; /* param list info */
econtext->ecxt_range_table = rtlist; /* range table */
for (i = 0; i < ncheck; i++)
{
qual = (List*) stringToNode (check[i].ccbin);
res = ExecQual (qual, econtext);
pfree (qual);
if ( !res )
return (check[i].ccname);
}
pfree (slot);
pfree (rte->relname);
pfree (rte);
pfree (rtlist);
pfree (econtext);
return ((char *) NULL);
}
HeapTuple
ExecConstraints (char *caller, Relation rel, HeapTuple tuple)
{
HeapTuple newtuple = tuple;
Assert ( rel->rd_att->constr );
if ( rel->rd_att->constr->num_defval > 0 )
newtuple = tuple = ExecAttrDefault (rel, tuple);
if ( rel->rd_att->constr->has_not_null )
{
int attrChk;
for (attrChk = 1; attrChk <= rel->rd_att->natts; attrChk++)
{
if (rel->rd_att->attrs[attrChk-1]->attnotnull && heap_attisnull (tuple,attrChk))
elog(WARN,"%s: Fail to add null value in not null attribute %s",
caller, rel->rd_att->attrs[attrChk-1]->attname.data);
}
}
if ( rel->rd_att->constr->num_check > 0 )
{
char *failed;
if ( ( failed = ExecRelCheck (rel, tuple) ) != NULL )
elog(WARN,"%s: rejected due to CHECK constraint %s", caller, failed);
}
return (newtuple);
}

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